Gravel washer



'IGRAVEL WASHER vFiled Sept. 24, 1926 2 Sheets-Shea?I 1 n lo a 1 i I o aCf' IN VEN TOR.

Nov. 27, 1928. 1,693,001

c. F. SMITH GRAVEL WASHER Filed'sept. 24, 1926 2 sheets-sheet 2 PatentedNov. 27, 1928.

UiliiTE STATES PATENT OFFICE.

CHARLES l. SMITH, OF MILWAUKEE, WISCONSIN, ASSIGNOR 'IO SMITHENGINEERING WORKS, OF lVIILWA'UKEE, vWISCONSIN', A CORPORATION OFWISCONSIN.

GRAVEL WASHER.

Application filed September 24, 1926.

This invention relates to improvements in gravel washers.

Gravel washers now in general use are open to the object-ion that theydo not wash out sticlry clay from the gravel.

It is, therefore, the primary object of the present invention to providea cylindrical screen gravel washer so constructedpas to efficiently washout sticky clay and like foreign substances.

A further object ef the invention is to pro` vide a gravel washer havinga scrubber in which the material is thoroughly churned up by liftingblades.

A further object of the invention is to provide a kgravel washer inwhich the larger boulders are retarded within a certain section and asthe device revolves, the boulders perform a ball mill action to grind upany clay, shale, slate, or other soft rock in the aggregate.

A further object of the invention is to provide a gravel washer in whichthe sand and pebbles can not in any way retard and blanket the grindingagencies, or embed themselves in the clay to armor this material, and inany way retard or hinder the ball mill action. p

A further object of the invention is to provide a gravel washer designedto effec tively retain the large aggregate.

A further object of the invention is to provide a gravel washer in whichsprays are introduced for the full length of the scrubbing section andthe dirty water is flushed outas fast as it is used, and in which, asthe material progresses toward the end of the scrubber, it iscontinuously flushed with clean water While the dirty water is flushedaway.

A further object of the invention is to provide a gravel washer which isof very simple construction, is strong and durable, and is well adaptedfor the purposes described.

With the above and other objects in view, the invention consists of theimproved gravel washer, and its parts and combinations as set forth inthe claims and all equivalents thereof.

In the accompanying drawings in which the same reference charactersindicate the same parts in all of the views:

Fig. 1 is a horizontal sectional view of the improved gravel washer;

Fig. 2, is a side view thereof;

Serial No. 137,494.

Fig. 3, is an end view thereof; Fig. 4, is an opposite end view;

Fig. 5, is a fragmentary detaill view partly p in section, and on alarger scale; and

Fig. 6, is another enlarged fragmentary detail view, partly in section.

Referring now more particularly tothe drawings, it will appear that thenumeral 10, indicates a supporting structure having a bearing l1 at oneend and a pair of bearing wheels 12 at the other end. The improvedgravel washer, generally indicated by the numeral 13, is mountedlongitudinally on said supporting structure and a shaft 14 mounted in abearing 15 is journaled in the bearing 11 formed in the rear end of thegravel washer, The opposite end portion of the gravel washer carries anexternal, annular flange 16 adaptedy to ride on the bearing wheels 12.Hence, by means of the bearings and wheels, the gravel washer isrevolubly mounted with respect to the supporting struct-ure.` i

The gravel washer `includes an inner elongated ycylindrical member 17termed a washing screen and an outer cylindrical member 18 termed ajacket, the aclret being of less length than thewashing screen andmounted with respect thereto as shown in Fig. 2. The said members 17 and18 are connected by means of angularv plates 19.

The inner or rear end of the washing screen is closed by means of a disccasting having attached thereto a bevel ring gear 2O adapted to meshwith a pinion gear 21 carried on a shaft 22 at right angles to thelongitudinal plane of the screen, the shaft 22 being journaled in abearing 23 carried by the end portion of the supporting structure 10.The outer end portion of the shaft 22 carries a pulley wheel 24 forconnection with a source of power by means of a belt (not shown).Obviously, by means of the gears described, the gravel washer may berevolved. The forward or outer end of the washing screen is partiallyclosed by a retainer ring 25 formed with a circular opening 26 ofsubstantial size to permit the introduction of material into the screen.The interior of the screen is also divided by two or more retainer rings27 and 28, forming a plurality of compartments 29, 30 and 31, thecompartment 31 being of greater size than the other compartments.

The forward compartments 29 and 30 provide what is known as thescrubbing section and secured to the interior Walls of the screenforming the scrubbing section areY longitudinally extending liftingblades 32. The outermost portion of the screen forming the scrubbingsection is unperforated, as at 88. The remaining portion of the screenvenclosing the compartments 29 and 8() is formed With a plurality ofsmall apertures 34. The portion of the screen enclosing the largecompartment 31, except for the extreme end portion thereof, is formedWith a plurality of apertures 35 substantially larger than the apertures84.

The outer acket 18 is formed in tWo sections 37 and 88 secured togetherby means of plates '36, as shown in Fig. 5. The portion 37' of thejacket Which covers the scrubbing sections of the Washing screen isprovided with perforations 39 of a small size and this section of themember 18 provides a sand jacket. The section 38 of the member 18 isformed with larger perforations 40 to provide a fine gravel jacket.

The method of Washing gravel by means of the improved Washer is asfollows:

rEhe improved gravel Washer is adapted for use in gravel plants andreceives the material usually after it has passed through a Washing box.'Ihe gravel Washer is revolved by means of the mechanism heretoforedescribed and the material is introduced into the open end of theWashing screen into the compartment 29. It should also be understoodthat the material is subjected to sprays of ivater during its entirestay in the scrubbing section of the gravel Washer. In the scrubbingsection or compartments 29 and 80, the material is thoroughly churned upby the lifting blades 32, and as it progresses toward the retainer rings27 and 28, sand and dirty Water are flushed through the per forations ofthe scrubbing section and the sand jacket. The fine aggregate passes thesand jacket and is conveyed to other mechanism for further operations.The boulders and small pebbles are retained in the and the material iscontinually flushed With clean Water through the entire length of thescrubbingsection, provision being madel for the draining off of dirtyWater. gravel Washer is of simple'and novel con- .truction, and is Weliadapted for the pur-y poses set forth.

What I claim as my invention is:

1. A revoluble gravel Washer, comprising a cylindrical perforatedWashing screen, a cylindrical perforated jacket surrounding the screen,the perforations of both Ymembers being of graduated sizes and extendingsubstantially the length of both members Whereby Water and material maybe flushed therethrough at any point, transverse retainer rings Withinthe screen, and lifting blades Within a portion of the screen andextending longitudinally parallel with the axis of the screen.

2. In a revoluble gravel Wasl1er,'a cylindrical perforated washingscreen having perforations of graduated sizes and extendingsubstantially the length of said member whereby Water and material maybe flushed therethrough at any point, transverse retainer rings Withinthe screen and dividing it into a scrubbing section and a gravelsection, the Yrings serving to restrict the removal of large materialfrom the scrubbing section to the gravel section, longitudinallyextending lifting blades Within only theY scrubbing section andextending parallel with the axis of the screen, and means for revolvingthe gravel Washer. Y

In testimony whereof, I aiix my signature.

CHARLES F. SMITH. f

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